CN105119236A - Intrinsically safe pilot control circuit used for mining - Google Patents
Intrinsically safe pilot control circuit used for mining Download PDFInfo
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- CN105119236A CN105119236A CN201510500811.2A CN201510500811A CN105119236A CN 105119236 A CN105119236 A CN 105119236A CN 201510500811 A CN201510500811 A CN 201510500811A CN 105119236 A CN105119236 A CN 105119236A
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Abstract
An intrinsically safe pilot control circuit used for mining solves technical problems of providing an intrinsically safe pilot control circuit which is with a circuit-breaking preventing function, able to realize electric isolation and signal transmission requirements, and used for mining. The adopted technical scheme is that the intrinsically safe pilot control circuit used for the mining comprises a voltage comparator V1, of which an in-phase input end is in parallel connection to an end of a resistor R6 and an end of a resistor R5, and then connected to a collector electrode of a photoelectric coupler U1. An anode of the photoelectric coupler U1 is in parallel connection to an end of a resistor R4, an end of a capacitor C2, an end of a capacitor C1 and then connected to one end of a resistor R3. The other end of the resistor R3 is sequentially in serial connection to a resistor R2, a resistor R1, a far-closing switch K2, a far-opening switch K1, and then connected to a cathode of a diode D1. An anode of the diode D1 is connected to a first input end of a 9V alternating current power supply. The invention is applicable to control circuits.
Description
Technical field
Mining intrinsic safety type leading control circuit of the present invention, belongs to the technical field of leading control circuit.
Background technology
The safety in production of underground coal mine is a fundamental state policy of China always; the important process being protection labourer's safety and Health and developing the productivity; due to the bad environments of underground coal mine; in order to ensure safety; have to according to the situation in hazardous area; a whole set of instrument system is divided into many independently buffer circuits; measuring transducer is placed in hazardous area; most of electronic circuits in instrument are then placed in the control room of place of safety; use xegregating unit in the connection place in place of safety and non-security district, realize electrical isolation and request signal transmission.
So-called electrical isolation, it is exactly isolation power supply and electricity consumption loop done electrically, isolate by the branch circuit of electricity consumption and whole electrical system, make it to become segregate on electrically, an independently earth-free safety system, the danger of Contact electricity is there is under preventing the charged situation of bare exposed conductor fault, to make between two circuit electrically on namely contact directly be mutually insulated between two circuit, also to ensure that two circuit maintain the relation of Energy Transfer simultaneously, generally speaking, electrical isolation method is divided into electromagnetic isolation and Phototube Coupling two kinds of modes.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, and technical problem to be solved is: provide a kind of mining intrinsic safety type leading control circuit having breaking line preventive function, can realize electrical isolation and request signal transmission.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: mining intrinsic safety type leading control circuit, comprise voltage comparator V1, the in-phase input end of described voltage comparator V1 one end of connecting resistance R6 are connected with the collector electrode of photoelectrical coupler U1 with behind one end of resistance R5, the positive pole of described photoelectrical coupler U1 one end of connecting resistance R4, one end of electric capacity C2 is connected with one end of resistance R3 with behind one end of electric capacity C1, the other end series resistor R2 successively of described resistance R3, resistance R1, combination switch K2 far away is connected with the negative pole of diode D1 with after guard's valve K1 far away, the positive pole of described diode D1 is connected with the first input end of 9V AC power, the normally opened contact KM1.1 of described contactor KM1 is attempted by the two ends of combination switch K2 far away, the other end of the second input shunt-wound capacitance C1 of described 9V AC power, the other end of electric capacity C2 is connected with the negative pole of photoelectrical coupler U1 with after the other end of resistance R4, the emitter of described photoelectrical coupler U1 is connected with one end of resistance R7,
The inverting input of described voltage comparator V1 is connected with one end of resistance R11, the other end of described resistance R11 is also connected with one end of resistance R9 behind one end of connecting resistance R10, the other end of described resistance R9 the other end of connecting resistance R5, the negative pole of diode D2, one end of the coil KJ1.1 of relay K J1, one end of electric capacity C4, one end of electric capacity C3 is connected with the output of pressurizer W1 with after the positive source of voltage comparator V1, the positive pole of described diode D2 is also connected with the positive pole of diode D3 after the other end of the coil KJ1.1 of contact relay KJ1, the negative pole of described diode D3 is also connected with the output of voltage comparator V1 after the other end of connecting resistance R6,
One end of the input shunt-wound capacitance C6 of described pressurizer W1, one end of electric capacity C5 is connected with the output plus terminal of rectifier bridge DB1 with behind one end of resistance R8, the output negative terminal of described rectifier bridge DB1 the negative pole of sending and receiving optical diode D4, the other end of electric capacity C5, the other end of electric capacity C6, the earth terminal of pressurizer W1, the other end of electric capacity C3, the other end of electric capacity C4, the other end of resistance R7 is connected with the power cathode of voltage comparator V1 with after the other end of electric capacity R10, the other end of described resistance R8 is connected with the positive pole of light-emitting diode D4, the input of described rectifier bridge DB1 is connected with 16V AC power, the normally opened contact KJ1.2 of described relay K J1 is serially connected between two lead-out terminals of precursor circuit.
The model of described photoelectrical coupler U1 is PC817, and the model of described pressurizer W1 is W7812, and the model of described voltage comparator V1 is LM393.
The present invention compared with prior art has following beneficial effect:
External cabling in mining intrinsic safety type leading control circuit of the present invention (has comprised moving-wire, holding wire) design towards the direction of essential safe type gradually, essence safety type circuits all cannot to ignite methane gas in various degradation failure situation, this just indirectly improves the safety in utilization of electric equipment, utilization model is the photoelectrical coupler U1 of PC817, realize electrical isolation and request signal transmission, this isolation method circuit is simple, applicability is wide, can be used for analog signal to control also to can be used for Digital Signals, being input as intrinsic safety exports as non-intrinsically safe circuit, may also be and be input as non-intrinsic safety and export as intrinsically safe circuit, whole circuit anti-interference ability is strong, working stability, long service life, cost is low, the unidirectional output of signal, output signal input without impact, in the present invention, diode D1 has breaking line preventive function, and diode D1 can ensure one-way conduction in start-up course, and when preventing binding post φ 8 and binding post φ 9 from breaking, short circuit causes error starting, further increases fail safe.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail;
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
As shown in Figure 1, mining intrinsic safety type leading control circuit, it is characterized in that: comprise voltage comparator V1, the in-phase input end of described voltage comparator V1 one end of connecting resistance R6 are connected with the collector electrode of photoelectrical coupler U1 with behind one end of resistance R5, the positive pole of described photoelectrical coupler U1 one end of connecting resistance R4, one end of electric capacity C2 is connected with one end of resistance R3 with behind one end of electric capacity C1, the other end series resistor R2 successively of described resistance R3, resistance R1, combination switch K2 far away is connected with the negative pole of diode D1 with after guard's valve K1 far away, the positive pole of described diode D1 is connected with the first input end of 9V AC power, diode D1 has breaking line preventive function, and diode D1 can ensure one-way conduction in start-up course, when preventing φ 8 and φ 9 from breaking, short circuit causes error starting, the normally opened contact KM1.1 of described contactor KM1 is attempted by the two ends of combination switch K2 far away, the other end of the second input shunt-wound capacitance C1 of described 9V AC power, the other end of electric capacity C2 is connected with the negative pole of photoelectrical coupler U1 with after the other end of resistance R4, the emitter of described photoelectrical coupler U1 is connected with one end of resistance R7,
The inverting input of described voltage comparator V1 is connected with one end of resistance R11, the other end of described resistance R11 is also connected with one end of resistance R9 behind one end of connecting resistance R10, the other end of described resistance R9 the other end of connecting resistance R5, the negative pole of diode D2, one end of the coil KJ1.1 of relay K J1, one end of electric capacity C4, one end of electric capacity C3 is connected with the output of pressurizer W1 with after the positive source of voltage comparator V1, the positive pole of described diode D2 is also connected with the positive pole of diode D3 after the other end of the coil KJ1.1 of contact relay KJ1, the negative pole of described diode D3 is also connected with the output of voltage comparator V1 after the other end of connecting resistance R6,
One end of the input shunt-wound capacitance C6 of described pressurizer W1, one end of electric capacity C5 is connected with the output plus terminal of rectifier bridge DB1 with behind one end of resistance R8, the output negative terminal of described rectifier bridge DB1 the negative pole of sending and receiving optical diode D4, the other end of electric capacity C5, the other end of electric capacity C6, the earth terminal of pressurizer W1, the other end of electric capacity C3, the other end of electric capacity C4, the other end of resistance R7 is connected with the power cathode of voltage comparator V1 with after the other end of electric capacity R10, the other end of described resistance R8 is connected with the positive pole of light-emitting diode D4, the input of described rectifier bridge DB1 is connected with 16V AC power, the normally opened contact KJ1.2 of described relay K J1 is serially connected between two lead-out terminals of precursor circuit, the model of described photoelectrical coupler U1 is PC817, the model of described pressurizer W1 is W7812, the model of described voltage comparator V1 is LM393.
Photoelectrical coupler U1 is used to realize photo-electric control signal transmission, photoelectrical coupler U1 is made up of light-emitting diode and phototriode, light-emitting diode has stable light output, phototriode receives the signal that light-emitting diode exports, circuit can be reliable and stable be light signal by the transform electrical signals of initial side, again light signal is converted to the signal of telecommunication of opposite side, realize the electrical isolation of both sides, input and output like this control with light signal, there is no direct electrical link, can reliably intrinsically safe circuit and non-intrinsically safe circuit be kept apart.
In this circuit arrangement, press and far control start button, phototriode in photoelectrical coupler U1 receives the signal that light-emitting diode exports, photoelectrical coupler U1 conducting, in-phase input end and the inverting input of voltage comparator V1 compare, when the voltage of the in-phase input end of voltage comparator V1 is greater than the voltage of the inverting input of voltage comparator V1, the normally opened contact KJ1.2 state of relay K J1 remains unchanged, and pilot circuit does not have conducting; When voltage comparator V1 output low level, the normally opened contact KJ1.2 of relay K J1 closes, pilot circuit conducting.
Mining intrinsic safety type leading control circuit of the present invention, electrical isolation and request signal transmission is realized by photoelectrical coupler U1, diode D1 has breaking line preventive function, prevent the error starting because short circuit after breaking causes, no matter control circuit is inner and lead-out wire is normally working or is being all safe under nonserviceabling, the electric spark produced can not light the explosive mixture in surrounding environment, the external cabling of the electric switch series products of current down-hole (has comprised moving-wire, holding wire) design towards the direction of essential safe type gradually, essence safety type circuits all cannot to ignite methane gas in various degradation failure situation, this just indirectly improves the safety in utilization of electric equipment, digital signal increases breaking line preventive design more further, just further avoid equipment control line at accidental damage broken string and accidental short circuit misoperation, then further improve fail safe, ensure the normal operation of power supply circuits.
To sum up, the present invention has substantive distinguishing features and progress; By reference to the accompanying drawings embodiments of the invention are explained in detail above, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (4)
1. mining intrinsic safety type leading control circuit, it is characterized in that: comprise voltage comparator V1, the in-phase input end of described voltage comparator V1 one end of connecting resistance R6 are connected with the collector electrode of photoelectrical coupler U1 with behind one end of resistance R5, the positive pole of described photoelectrical coupler U1 one end of connecting resistance R4, one end of electric capacity C2 is connected with one end of resistance R3 with behind one end of electric capacity C1, the other end series resistor R2 successively of described resistance R3, resistance R1, combination switch K2 far away is connected with the negative pole of diode D1 with after guard's valve K1 far away, the positive pole of described diode D1 is connected with the first input end of 9V AC power, the normally opened contact KM1.1 of described contactor KM1 is attempted by the two ends of combination switch K2 far away, the other end of the second input shunt-wound capacitance C1 of described 9V AC power, the other end of electric capacity C2 is connected with the negative pole of photoelectrical coupler U1 with after the other end of resistance R4, the emitter of described photoelectrical coupler U1 is connected with one end of resistance R7,
The inverting input of described voltage comparator V1 is connected with one end of resistance R11, the other end of described resistance R11 is also connected with one end of resistance R9 behind one end of connecting resistance R10, the other end of described resistance R9 the other end of connecting resistance R5, the negative pole of diode D2, one end of the coil KJ1.1 of relay K J1, one end of electric capacity C4, one end of electric capacity C3 is connected with the output of pressurizer W1 with after the positive source of voltage comparator V1, the positive pole of described diode D2 is also connected with the positive pole of diode D3 after the other end of the coil KJ1.1 of contact relay KJ1, the negative pole of described diode D3 is also connected with the output of voltage comparator V1 after the other end of connecting resistance R6,
One end of the input shunt-wound capacitance C6 of described pressurizer W1, one end of electric capacity C5 is connected with the output plus terminal of rectifier bridge DB1 with behind one end of resistance R8, the output negative terminal of described rectifier bridge DB1 the negative pole of sending and receiving optical diode D4, the other end of electric capacity C5, the other end of electric capacity C6, the earth terminal of pressurizer W1, the other end of electric capacity C3, the other end of electric capacity C4, the other end of resistance R7 is connected with the power cathode of voltage comparator V1 with after the other end of electric capacity R10, the other end of described resistance R8 is connected with the positive pole of light-emitting diode D4, the input of described rectifier bridge DB1 is connected with 16V AC power, the normally opened contact KJ1.2 of described relay K J1 is serially connected between two lead-out terminals of precursor circuit.
2. mining intrinsic safety type leading control circuit according to claim 1, is characterized in that: the model of described photoelectrical coupler U1 is PC817.
3. mining intrinsic safety type leading control circuit according to claim 1, is characterized in that: the model of described pressurizer W1 is W7812.
4. mining intrinsic safety type leading control circuit according to claim 1, is characterized in that: the model of described voltage comparator V1 is LM393.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510500811.2A CN105119236A (en) | 2015-08-17 | 2015-08-17 | Intrinsically safe pilot control circuit used for mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510500811.2A CN105119236A (en) | 2015-08-17 | 2015-08-17 | Intrinsically safe pilot control circuit used for mining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105119236A true CN105119236A (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510500811.2A Pending CN105119236A (en) | 2015-08-17 | 2015-08-17 | Intrinsically safe pilot control circuit used for mining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105119236A (en) |
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2015
- 2015-08-17 CN CN201510500811.2A patent/CN105119236A/en active Pending
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Application publication date: 20151202 |